Hello Cindy,
These articles should help you:
172221 How to Move One or More Zone Files to a New Windows NT DNS Server
http://support.microsoft.com/?id=172221
193820 How to Move a WINS Database to Another Server
http://support.microsoft.com/?id=193820
130642 How to Move a DHCP Database to Another Windows Server
http://support.microsoft.com/?id=130642

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Regards,
Mohanchand Koduri [MSFT]
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> My PDC has primary dns zone,Dhcp subnet is
> 10.181.29.x,BDC has secondary dns zone, dhcp subnet is
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>
> Cindy Hsu